{"affected":[{"defaultStatus":"unaffected","product":"Linux","source":"CNA: Linux","vendor":"Linux","versions":[{"lessThan":"face65f80c6946c631ca3490b4ebd2c016a4fd2c","status":"affected","version":"0613ad2401f88bdeae5594c30afe318e93b14676","versionType":"git"},{"lessThan":"6c66653dac9b25272d5fd4ed42a34aa5249e16df","status":"affected","version":"0613ad2401f88bdeae5594c30afe318e93b14676","versionType":"git"},{"lessThan":"5b82af744e06cd741938c3da54fdbe564a7e52d9","status":"affected","version":"0613ad2401f88bdeae5594c30afe318e93b14676","versionType":"git"},{"lessThan":"618cf6b139503ec18ef93ffd663396aaf99b763a","status":"affected","version":"0613ad2401f88bdeae5594c30afe318e93b14676","versionType":"git"},{"lessThan":"a3b5f242997a3be7404112fd48784881560aea57","status":"affected","version":"0613ad2401f88bdeae5594c30afe318e93b14676","versionType":"git"},{"status":"affected","version":"41ed46bdbd2878cd6567abe0974a445f8b1b8ec8","versionType":"git"},{"status":"affected","version":"25f05d762ca5e1c685002a53dd44f68e78ca3feb","versionType":"git"},{"status":"affected","version":"a46e681151bbdacdf6b89ee8c4e5bad0555142bb","versionType":"git"},{"status":"affected","version":"3b29f8769d32016b2d89183db4d80c7a71b7e35e","versionType":"git"},{"status":"affected","version":"3049a3b927a40d89d4582ff1033cd7953be773c7","versionType":"git"},{"status":"affected","version":"afc898019e7bf18c5eb7a0ac19852fcb1b341b3c","versionType":"git"},{"status":"affected","version":"c9e85979b59cb86f0a15defa8199d740e2b36b90","versionType":"git"},{"status":"affected","version":"2044b2ea77945f372ef161d1bbf814e471767ff2","versionType":"git"},{"lessThan":"4.10","status":"affected","version":"4.9.337","versionType":"semver"},{"lessThan":"4.15","status":"affected","version":"4.14.303","versionType":"semver"},{"lessThan":"4.20","status":"affected","version":"4.19.270","versionType":"semver"},{"lessThan":"5.5","status":"affected","version":"5.4.229","versionType":"semver"},{"lessThan":"5.11","status":"affected","version":"5.10.163","versionType":"semver"},{"lessThan":"5.16","status":"affected","version":"5.15.86","versionType":"semver"},{"lessThan":"6.1","status":"affected","version":"6.0.16","versionType":"semver"},{"lessThan":"6.2","status":"affected","version":"6.1.2","versionType":"semver"}]},{"defaultStatus":"affected","product":"Linux","source":"CNA: Linux","vendor":"Linux","versions":[{"status":"affected","version":"6.2"},{"lessThan":"6.2","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.160","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.114","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.42","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.5","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2","versionType":"original_commit_for_fix"}]}],"cveId":"CVE-2026-72073","cwes":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmmc: vub300: fix use-after-free on probe failure\n\nThe vub300 driver lifetime-manages its controller state using\nvub300->kref, with vub300_delete() freeing the mmc host when the last\nreference is dropped. The probe error path after the inactivity timer has\nbeen armed still bypasses that lifetime rule, however, and falls through\nto mmc_free_host() directly if mmc_add_host() fails.\n\nThe race window is between arming the inactivity timer and reaching the\nprobe error unwind after mmc_add_host() fails:\n\n        probe thread                     timer/workqueue\n        ------------                     ---------------\n        kref_init(&vub300->kref)         ref = 1\n        kref_get(&vub300->kref)          ref = 2, timer ref\n        add_timer(inactivity_timer)      fires after one second\n        |\n        |   race window\n        |<---------------------------------------------------->\n        |\n        mmc_add_host(mmc)\n                                         inactivity timer fires\n                                         vub300_queue_dead_work()\n                                           kref_get()          ref = 3\n                                           queue_work(deadwork)\n        mmc_add_host() fails\n        timer_delete_sync()\n        mmc_free_host(mmc)\n          frees vub300\n                                         deadwork runs\n                                           use-after-free\n\nThe inactivity timeout is one second, so this would require\nmmc_add_host() to both fail and take more than one second to do so. This\nis unlikely to happen in practice, but the error path is still wrong.\n\ntimer_delete_sync() only waits for the timer callback itself. It does\nnot flush deadwork that the callback may already have queued. As a\nresult, queued deadwork can still hold a kref while the probe error path\ndirectly frees the backing mmc host, including the vub300 storage.\n\nFix this by using the same lifetime mechanism as disconnect. Clear\nvub300->interface so that the timer callback and any queued deadwork\nreturn early and drop their references, then drop the initial probe\nreference and return without falling through to err_free_host.","epss":{"date":"2026-11-06","percentile":0.12511,"score":0.00219},"exploits":[],"kev":null,"metrics":[],"modifiedAt":1793985576453,"publishedAt":1786773144676,"references":[{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/face65f80c6946c631ca3490b4ebd2c016a4fd2c"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/6c66653dac9b25272d5fd4ed42a34aa5249e16df"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/5b82af744e06cd741938c3da54fdbe564a7e52d9"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/618cf6b139503ec18ef93ffd663396aaf99b763a"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/a3b5f242997a3be7404112fd48784881560aea57"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/5b82af744e06cd741938c3da54fdbe564a7e52d9"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/618cf6b139503ec18ef93ffd663396aaf99b763a"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/6c66653dac9b25272d5fd4ed42a34aa5249e16df"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/a3b5f242997a3be7404112fd48784881560aea57"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/face65f80c6946c631ca3490b4ebd2c016a4fd2c"}],"remediation":[],"revision":"ba3bbb4f3939357c6a44324e7990f478d0a41bdfe6937d1a42adf78a9fc39596","sources":[{"modifiedAt":1793984119555,"name":"CNA: Linux","retrievedAt":1793986034315,"url":"https://www.cve.org/CVERecord?id=CVE-2026-72073"},{"modifiedAt":1793985576453,"name":"NVD","retrievedAt":1793989683302,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72073"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1793986082197,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-72073"}],"ssvc":{"assessedAt":1793983875978,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"mmc: vub300: fix use-after-free on probe failure","updatedAt":1793989683302}